This article was in the Philly Inquirer, but hits on issues throughout the nation.
Overall, it was actually a very good article (although the author still doesn't grasp why the feds rejected PA's I-80 Toll Road's proposal).
http://www.philly.com/philly/blogs/inq-phillydeals/smart-roads-instant-tolls-qa-with-a-highway-man-20170717.html